document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=718048>Question 718048</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if a man and a boy can do a work in 8 days,this work can do 2 man and 4 boy in 3 days .how many days it will takes if a man or a boy do alone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #440733 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=440733\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5B1%5D+ ALIGN=MIDDLE  ALT=\"+r%5B1%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the rate that the man works<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5B2%5D+ ALIGN=MIDDLE  ALT=\"+r%5B2%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the rate that the boy works<BR>\n" );
document.write( "Add their rates to get rate working together<BR>\n" );
document.write( "( 1 job ) / ( 8 days ) is rate working together, so<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5B1%5D+%2B+r%5B2%5D+=+1%2F8+ ALIGN=MIDDLE  ALT=\"+r%5B1%5D+%2B+r%5B2%5D+=+1%2F8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------------------<BR>\n" );
document.write( "Then you are given the case with 2 times the rate for a man<BR>\n" );
document.write( "and 4 times the rate for a boy<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2r%5B1%5D+%2B+4r%5B2%5D+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+2r%5B1%5D+%2B+4r%5B2%5D+=+1%2F3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------------------------------<BR>\n" );
document.write( "Multiply both sides of (1) by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2+ ALIGN=MIDDLE  ALT=\"+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and subtract (1) from (2)<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2r%5B1%5D+%2B+4r%5B2%5D+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+2r%5B1%5D+%2B+4r%5B2%5D+=+1%2F3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-2r%5B1%5D+-+2r%5B2%5D+=+-2%2F8+ ALIGN=MIDDLE  ALT=\"+-2r%5B1%5D+-+2r%5B2%5D+=+-2%2F8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2r%5B2%5D+=+1%2F3+-+1%2F4+ ALIGN=MIDDLE  ALT=\"+2r%5B2%5D+=+1%2F3+-+1%2F4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2r%5B2%5D+=+4%2F12+-+3%2F12+ ALIGN=MIDDLE  ALT=\"+2r%5B2%5D+=+4%2F12+-+3%2F12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2r%5B2%5D+=+1%2F12+ ALIGN=MIDDLE  ALT=\"+2r%5B2%5D+=+1%2F12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5B2%5D+=+1%2F24+ ALIGN=MIDDLE  ALT=\"+r%5B2%5D+=+1%2F24+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and, since<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5B1%5D+%2B+r%5B2%5D+=+1%2F8+ ALIGN=MIDDLE  ALT=\"+r%5B1%5D+%2B+r%5B2%5D+=+1%2F8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5B1%5D+%2B+1%2F24+=+1%2F8+ ALIGN=MIDDLE  ALT=\"+r%5B1%5D+%2B+1%2F24+=+1%2F8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5B1%5D+%2B+1%2F24+=+3%2F24+ ALIGN=MIDDLE  ALT=\"+r%5B1%5D+%2B+1%2F24+=+3%2F24+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5B1%5D+=+2%2F24+ ALIGN=MIDDLE  ALT=\"+r%5B1%5D+=+2%2F24+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r%5B1%5D+=+1%2F12+ ALIGN=MIDDLE  ALT=\"+r%5B1%5D+=+1%2F12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "A man, working alone can do 1 job in 12 days<BR>\n" );
document.write( "A boy, working alone, can do 1 job in 24 days<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "check the answer:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2r%5B1%5D+%2B+4r%5B2%5D+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+2r%5B1%5D+%2B+4r%5B2%5D+=+1%2F3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2%2A%281%2F12%29+%2B+4%2A%281%2F24%29+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+2%2A%281%2F12%29+%2B+4%2A%281%2F24%29+=+1%2F3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F6+%2B+1%2F6+=+1%2F3+ ALIGN=MIDDLE  ALT=\"+1%2F6+%2B+1%2F6+=+1%2F3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F6+%2B+1%2F6+=+2%2F6+ ALIGN=MIDDLE  ALT=\"+1%2F6+%2B+1%2F6+=+2%2F6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );